1-(amino and hydroxy)-4-anilino-3&#39;-sulfo-anthraquinones substituted with a fiber reactive group at the 4&#39;-position



United States Patent Ofi ice 3,365,472 1 (AIVIINO AND HYDROXY) 4 ANILINO 3'- SULFO ANTHRAQUINONES SUBSTITUTED WITH A FIBER REACTIVE GROUP AT THE 4'-POSITION Arthur Buehler, Rheinfelden, and Hans Ulrich Schuetz, Basel, Switzerland, assignors to Ciba Limited, Basel, Switzerland, a Swiss company No Drawing. Continuation-impart of application Ser. No. 240,411, Nov. 27, 1962. This application Mar. 1, 1965, Ser. No. 436,266

Claims priority, application Switzerland, Nov. 29, 1961,

13,901/61 8 Claims. (Cl. 260-372) ABSTRACT OF THE DISCLOSURE l-aminoor 1-hydroxy-4-phenylaminoanthraquinone dyestuifs containing a sulfonic acid group and a fibrereactive aliphatic acylamino group bound to the phenyl nucleus.

in which X represents a hydroxyl group or an amino group, n represents a positive whole number of a value not greater than 5, and Y represents a reactive aliphatic acyl group, which is a member selected from the group consisting of an acryl-, a monoha1ogenoacry1-, ahalogenacetyl-, fi-halogenopropionyL, and an azp-dihalogenopropionyl radical.

A reactive acyl group is an acyl group capable of reacting with a fiber, that is, an acyl group which can react with the hydroxyl groups of cellulose, for example, with the formation of a covalent bond. Examples of such groups are mutt-unsaturated acyl radicals (such as the vinylsulfonyl, acryl, monochloroacryl and the HCECCO groups) and acyl radicals containing removable substituents, such as those derived from aliphatic carboxylic acids or sulfonic acids containing in the aliphatic chain, advantageously in -a-, .18- and/or 'y-position, an easily removable substituent that takes with it the pair of electrons that form the bond. As such radicals the following may be mentioned:

The invention also provides a process for the manufacture of dyestuffs of the Formula 1 by treating the appropriate dyestufis containing a sulfonic acid group in Patented Jan. 23, 1968 the 2-position of the anthraquinone radical, that is to say, dyestuffs of the formula 15 in which X, Y and n have the meanings given in Formula I 1, with reducing agents in a slightly acid to alkaline bath to split off the sulfonic acid group from the 2-position.

As anthraquinone dyestuffs which can be used as starting materials for the present process are mentioned more especially the acryl and chloroor bromopropionyl derivatives of l-amino-4-(4'-aminophenylamino)-anthraquinone-2:3-disulfonic acid and 1-amino-4-( 3-aminopheny-lamino)-anthraquinone-2:4'-disulfonic acid containing a free amino group in the 1-position and in which the acryl 25 or propionyl substituent is in the other amino group.

The treatment of the dyestuffs of the Formula 2 with reducing agents in accordance with the process of the invention is advantageously carried out in an aqueous medium, for example, in a slightly acid, neutral or alkaline 30 medium, using sodium sulfide, sodium dithionite, hydroxy alkyl sulfinic acids, zinc or sodium formaldehyde sulfoxylate, glucose, fructose, galactose or cellulose xanthate. The treatment is advantageously carried out at a moderately raised temperature, for example, at 20 to 60 C. After removal of the sulfonic acid group from the 2-position the resulting dyestuffs can, if necessary, be reoxidized. Dyestulfs of the Formula 1 are thus obtained, even in those cases where the treatment with reducing agents not only brings about removal of the sulfonic acid group from the 2-position of the anthraquinone nucleus, but also causes a reduction of the anthraquinone dyestuif.

The products of the Formula 1 obtained by the process of the invention can also surprisingly be made by acylating dyestuiis of the formula in which X and n have the meanings given in Formula 1,

with anhydrides or halides of aliphatic acids containing a reactive position in the aliphatic chain, that is to say, 6 a position capable of reacting with fibrous material with the formation of a covalent bond.

As acylating agents of this kind are mentioned more especially acrylic acid chlorides, chloracetyl, chloroor bromopropionyl and mB-dichloropropionyl chloride or bromide.

The dyestuffs of the Formula 3 to be acylated in accordance with the invention are obtainable by the usual methods, for example, as described in German specification 541,266 to I. G. Farbenindustrie A.G., issued Jan. 6, 1932 or French specification 1,140,533 to Sandoz S.A., issued Mar. 4, 1957, from 1-amino-4-(aminophenylamino) -anthraquinone-2-sulfonic acids.

The acylation process in accordance with the invention is advantageously carried out in an aqueous medium in the presence of an agent capable of binding acid such as sodium carbonate or sodium or potassium hydroxide.

The acrylamino compounds corresponding with Formula 1 can also be prepared from the corresponding [3- chloroor fl-bromo-propionylamino derivatives by the splitting off of hydrogen halide by means of an alkali.

The dyestuffs of the Formula 1 obtained by the process of the invention are new. They are suitable for dyeing or printing a very wide variety of materials, especially animal and synthetic fibers containing nitrogen such as polyamide and polyurethane fibers, silk and wool from a slightly acid, neutral or slightly alkaline bath. The dyeings and prints so obtained possess a good fastness to light and washing and, as a rule, are fast to perspiration and milling. The new dyestuffs have particularly good levelling properties.

Unless otherwise stated, the parts and percentages in the following examples are by weight, and the relationship of parts by weight to parts by volume is the same as that of the gram to the cubic centimetre.

Example 1 48.9 parts of 1-amino-4-(4'-arninophenylamino)-anthraquinone-Z:3-disulfonic acid were dissolved in 400 parts of Water in the presence of about 4 parts of sodium hydroxide.

After the addition of 21.2 parts of sodium carbonate the solution was cooled to C. by the addition of ice and 34 parts of B-chloropropionyl chloride were added at O to 5 C. After the acylation, the dyestuff was precipitated by the addition of sodium chloride and isolated by filtration.

The dyestuff paste so obtained was dissolved -in 2000 parts of water at C. and 19.2 parts of sodium hydrosulfite were added to the solution. After a short time a brown-yellow vat was formed to which were added 6.4 parts of sodium hydroxide and the whole stirred for a long period. The dyestuff which slowly crystallized out was isolated and washed with a solution of sodium chloride. The dyestuff so obtained dyed wool in a neutral or slightly acid bath full, reddish blue tints possessing excellent properties of fastness.

Example 2 The dyestuff paste obtained as described in Example 1 was boiled under reflux for 10 minutes with a solution of 42.4 parts of sodium carbonate in 800 parts of water. From the cooled solution, optionally filtered to remove impurities, the resulting dyestuff was precipitated almost completely. The dyestutf so obtained was isolated, washed with a solution of sodium chloride and dried in vacuo at 50 C. It formed a blue powder that gave a blue solution in water and a violet solution in concentrated sulfuric acid. The dyestuff dyed wool in a neutral or slightly acid bath full, reddish blue tint-s possessing good properties of fastness.

Similar dyestuffs were obtained by using as starting materials the dyestuffs listed in Column I of the following table instead of the chloropropionylated dyestutf obtained as described in Example 1. Column II shows the tints obtained on cotton and wool.

I II

1 fi 171112 Reddish-bluesour II I I o NH- -1;Io 0 0 H10 HzCl ITIHC O C HzCHz-Cl i I IH-QSmH Violet.

I II

13 NH, Do.

soarr II I I NH- NH-o 0-o=orn 14 0 NH; Do.

(:1 NH-C O-C=CH2 b I IH- SOaH Example 3 2. The dyestuff of the formula 48.9 parts of 1-amino-4-(4'-arninophenylamino)-anthraquiuone-Z:3'-disulfonic acid were dissolved in 1000 parts of water at 50 C., and the solution neutralized with about 4 parts of sodium hydroxide. 19.2 parts of sodium hydrosul fite were then sprinkled in, the whole stirred for minutes, whereupon 16 parts of sodium hydroxide were added and stirring continued for two hours while the temperature was allowed to drop. The resulting dyestutf, desulfonated at the 2-position, was precipitated by the addition of sodium chloride, isolated by filtration, and washed with a solution of sodium chloride.

The dyestuif paste so obtained was dissolved in 2000 parts of water at 70 C. The solution was cooled to 0 C. by the addition of ice and then 21.2 parts of sodium carbonate and 34 parts of fl-chloropropionyl chloride were added simultaneously. After the acylation, the dyestuff was precipitated by the addition of sodium chloride and isolated by filtration. It possessed the same properties as the dyestuff described in Example 1 and dyed wool reddish blue tints.

The dyestuff was converted into the acryl derivatives and worked up in a manner analogous to that described in Example 2. The dye'stuif so obtained exhibited the same dyeing properties as the dyestuff prepared as described in Example 2.

DYEING PRESCRIPTION 100 parts of a wool embroidery yarn were entered, at 50 to 80 G, into a dyebath containing 10 parts of crystallized sodium sulfate, -6 parts of 40% acetic acid and 2 parts of the dyestufi prepared as described in Example 1 in 3000 parts of water. The dyebath was, brought to the boil in the course of minutes and dyeing continued at the boil for one hour. The wool was then rinsed and dried. A level reddish blue dyeing was obtained.

What is claimed is:

1. An anthraquinone dyestutf of the formula in which X represents a member selected from the group consisting of a hydroxyl and an amino group, n represents a positive whole number up to 5 and Y represents a member selected from the group consisting of an acry1-, a monohalogenoacryl-, a halogenacetyl-, B-halogenopropionyl-, and an wp-dihalogenopropionyl radical.

O NH:

SOJH

I ii NHNHCOCH=CH:

3-. The dyestuif of the formula 1; NH NHCO 011201 l 0 NH-Qsmrr 6. The dyestufi' of the formula (I? NH:

7. The dyestutf of the formula 1 111-0 0-o=oI-n I o NlI-O-SOaH 10 8. The dyestuff of the formula References Cited 7 UNITED STATES PATENTS NH 1,927,125 9/1933 Kalischer et a1. 260-60 2 ll 5 FOREIGN PATENTS 282,409 4/1928 Great Britain. 779,781 7/1957 Great Britain. C1 830,876 3/1960 Great Britain. 1 1,238,515 9/1959 France. 0 NH NHC0C=CH2 1 LORRAINE A. WEINBERGER, Primary Examiner.

80m H. c. WEGNER, Assistant Examiner. 

